US1625069A - Adjustable fixture - Google Patents

Description

vApril 19, 1927. 1,625,069

l G. ARRAS ET AL ADJUSTABLE FIXTURE Filed Nov. 26. 1925 InvariZs. 66079@ rm Patented Apr. 19, 1927.

UNITED STATES PATENT OFFICE.

ADJUSTABLE FIXTURE.

Application filed November 26, 1923.

rIhis invention relates to a fixture particularly designed and intended for use with elect-ric lamps and shades or reflectors The principal object of the invention is to provide a lamp holder which can be adjusted to accommodate lamps of different sizes to the same shade, or a lamp to different shades, for the purpose of producing the desired or the best illuminating effects. The principal object of the invention is to provide an adjustable lamp holder of this kind in which the height of the socket can be adjusted without removing or disconnecting any portion of the shade or lixture. A still further object is to produce a lamp and fixture holder of the construction herein shown and described.

In the accompanying drawings, Fig. 1 is an elevation partly in section of a fixture holder constructed in accordance with the principles of this invention; Figs. 2 and 3 are side and end views respectively of the fixture proper; Fig. et is a section taken on the line l--et of Fig. 3; and Fig. 5 illustrates a detail of the locking means.

In applying an electric lamp to a glob-e or reflector to produce a certain light intensity or effect, it is frequently necessary to change the size of the lamp, and as the lamps vary in length, some provision must be made for varying the position of the lamp with respect to the reflector or glob-e. As proposed in the present invention. this variation is accomplished by providing the fixture holder with an adjustable socket which is designed to position the lighting filament of different lamps at various points with respect to the reflector.

In carrying out this invention, a supporting plate or member 1 has a projecting nipple threaded on the inside for receivinga fixture stem 3, and on the outside for receiving a lock nut 4. Atthe base of the externally threaded portion of the nipple is a holder made by an angular shoulder 5 for receiving the correspondingly perforated upper end 6 of a shade or reflector 7 which has a tubular portion 8 adapted to sin'round the supporting member 1 and extending for a distance below it. `Washers 6 and 6b are placed on opposite sides of the perforated portion 6 of the reflector and are held in place against the upper side of the supporting member 1 by means of a plat-e 4: which is engaged by the locking washer 4. j

In the tubular portion 8 of the reflector is serial No. 676,893.

housed the lamp supporting means which comprises a pair of rods t) projecting at the opposite sides of the plate or support 1 and having notches or annular grooves 10 at spaced intervals, with inclined edges l0 leading therefrom. l

A socket member 11 has lateral extensions 12 with perforations 13 for receiving rods 9, and adjacent thereto are perforations 1st in which bolts or screws 15 are loosely inserted from the underside thereof. At the upper end of each screw is a locking member 1G preferably formed with a metal bend in the general shape of a Z. one otl which is perforated and held .in place at the end of each screw 15 by means of a nut 17 which presses the member against the face of the projection 1:2. The other end is formed with a notch 1S which is adapted to engage any one of the notches or grooves of the adjacent rod 9, thus providing a separate locking member for each of the rods.

lVithin the socket member is a shell contact 19 and a center contact 20 connected through the socket member in ya well known manner with corresponding contact terminals 21 and 22. A lamp is inserted in the socket member and makes electrical connection in a well known manner, the conductor wires being omitted for clearness, it being obvious that sufficient space is left between the socket member 11 and the support 1 for allowinO' such conductors to be looped and connected in the ordinary manner.

In adjusting this holder the screws 15 are loosened so that the locking member 16 can be moved out of engagement with the notches or grooves 10, as shown in 5, and for this purpose the notches are preferably formed with rounded or inclined rather than angular' edges so that the locking members can be easily moved out of engagement therewith. The natural position of the socket will tend to engage the locking members in the notches as the socket is moved along the rods 9 and when the proper position is reached the screws 15 can be tightened, positively locking the socket member in place. Vith this construction it is obvious that the socket member can be moved or adjusted with respect to the shade or reflector for obtaining different lighting effects with the same lamp, or for positioning` lamps of different sizes so that the lighting filaments thereof will be at the same location with respect to the reflector. It is furthermore ob- 1 lla) lll vious that the same lamp may loe used With reflectors of different sizes. ft is not necessary to remove or disengage the reflector 7 to make any desired adjustment of the socket holder. lt may bc necessary to remove the lamp so that access may be had more freely to the screws 15, but after the proper adjustment is madethe screws may be tightened lockingthe socket member in the desired position.

Vile claim:

l. In an adjustable fixture, a supportingr rod With spaced notches. an insulating lamp socket having' an integral perforated projec tion through which the rod slides, and clampinn` means comprising' a bent resilient strip, one end of 'which is adapted to engage the notches in the rod. and means to secure the other end of the strip to the socket and to press the first end against the rod.

2. fn a ,fixture of the class described, a notcheo supporting` rod. an insuiatinfr lamp socket with an integral perforated portion into which the rod projects. a resilient strip having` a notch at one end to engage the notches of the rod, and fasteningmeans in* cluding' a nut and scrcv.v engraa'inc` the other end for pressing' and locking the strip in engagement with the rod.

ln an adjustable fixture, a socket member with a perforated projection, a notched supporting' bar adapted to extend through the perforation, the notches having' inclined sides, notch engaging means carried by the holder comprising` a bent resilient strip, one end of which is adapted to engage in the notches of the rod and the other end having` a perforation, a fastening screnv extending through the projection of the socket member recae-o and through the perforation of the strip, and a nut threaded on the end of the screw and engaging the strip for binding' it firmly in engagement with the notch of the rod.

4. In an adjustable fixture, a supporting member having' a pair of spaced rodsl projectini,Y therefrom with notches at intervals alcun),` the rods, a lamp socket With perforated projections through which the rods extend, fastening' means carried by the socket for engagingy the notches said means including' screws extending through the projections, and a shade member with a tubular portion extending' over the supjfiorting member, the rods, and the socket, and for housing` a lan'ip therein, the lsaid adj Listing screws beine' accessible from the inside of the shade member Without displacing` it with respect to the supporting member or the socket in adjusting' the latter.

5. In a fixture kof the class described, a supporting; plate having a {Hojee-ting' nipple with an angular shoulder at the base thereof, notched supporting' rods jn'ojectiire,` from the plate, a socket member with perforated projections through which the rods extend, fastening' screws extending through the projections adjacent each rod, resilient clamping; means operated by the screws for engaging' the notches of the shade, a shade Wit-h a tubular portion extending' over the supporting' plate and the socket 'with a perforation at the end to encrage the angular shouldered portion on the plate, and means for securing' the tubular perforated end of the shade at the top of the plate.

GEORGE i-XRRAS. DYWfGI-l E. lVORRELL.

Images